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Ecology of Euthynnus affinis
 
Main Ref. Collette, B.B. and C.E. Nauen, 1983
Distribution
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
 Marine - Oceanic
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
 Brackishwater
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
 Freshwater
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Euthynnus affinis may be found.
Remarks Like other scombrids, E. affinis tend to form multispecies schools by size especially with small T. albacares, K. pelamis, Auxis sp. and M. cordyla comprising from 100 to over 5,000 individuals. But during certain periods of the year, there is a tendency for the fish to remain scattered (Ref. 168). Kawakawa is piscivorous. Most important prey items of the immature smaller E. affinis were the larval anchovy and lanternfish while the matured fish Decapterus spp and Scomber australicus (Ref. 53677).

Substrate

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type mainly animals (troph. 2.8 and up)
Feeding type ref Collette, B.B. and C.E. Nauen, 1983
Feeding habit hunting macrofauna (predator)
Feeding habit ref Collette, B.B. and C.E. Nauen, 1983
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition 4.50 Troph of adults from 1 study.
Ref. Chiou, W.-D., L.-Z. Cheng and K.-W. Chen, 2004
From individual food items 4.47 0.80 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Luna, Susan M. on 10.19.90
Modified by Ortañez, Auda Kareen on 01.24.08
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